JPH06337017A - Coupling device for mechanical element with structural member movable in periphery of longitudinal axial center so as not to be turned - Google Patents

Abstract

PURPOSE: To provide a device of space saving structure suitable for connecting a mechanical element to the other mechanical part unrotatably, particularly, fixing a mechanical element to a structural member movable about the longitudinal axis so as to transmit a torque and prevent the deformation of the fastened structural member. CONSTITUTION: This device, when shown as the example of a claw stopper 1 on the claw shaft 2 of a sheet paper printer, is formed of a tension band 5 firmly connected to the claw stopper 1 and embracing more than 180 deg. of a circumference of the claw shaft 2, a pressing member 6 having an inner side fitting matching the circumferential profile of the claw shaft 2, and at least one clamping device 7. The tension band 5 is held by the clamping device 7, and the pressing member 6 can be clamped radially to the longitudinal axis 8 of the claw 2 movable about the longitudinal axis thereof by the clamping device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device as claimed in the preamble of claim 1, i.e. to mechanically couple a machine element to a structural member movable about a longitudinal axis of the machine part. It is related to the device. In particular, the invention does not rotate the pawl stopper on the outer periphery of the hollow shaft of the printing press, which is movable around the longitudinal axis, preferably on the pawl shaft of a sheet-fed printing press, and with regard to the phase angle. Concerning tightening and fixing in stages.

[0002]

2. Description of the Related Art A mechanical element is fixed to a mechanical structural member in a continuously adjustable or adjustable manner with respect to a rotation angle, and further, withstands a torque load, particularly a repetitive load without changing the position of the mechanical element with respect to the structural member. In order to be able to do so, a large frictional force and a corresponding large radial clamping force are required between the fixing surfaces which are in contact with each other. Retaining mechanical elements against rotation is ensured by rounded or rounded cross-sections at the fixing points of the structural members and tightened so that they can be fixed steplessly at each arbitrary angular position. This is made difficult by the requirement that cross-sectional shape changes should not occur. The following retaining rings that surround structural members at fixed points are known. That is, the thickened opposite ends of the retaining ring face each other across a gap extending substantially in the axial plane of the longitudinal axis of the structural member, and are secured by one tightening screw or a plurality of tightening screws. It can be clamped perpendicular to the gap, so that the retaining ring is pressed against the outer circumference of the structural member. In such a retaining ring, the tightening force acting in the radial direction on the structural member in different outer peripheral regions is very different, and a strong peak value (maximum value) of the tightening force is generated especially at the gap edge, so that it is hollow. The shaft is susceptible to cross-sectional shape changes. This will damage the internal bearings. Such a disadvantage is that the sheet gripper stopper is fixed on the hollow shaft by means of such known fasteners and is driven into the hollow shaft by vibrating about a longitudinal axis. The control shaft for the sheet gripper is supported with as little play as possible,
It has to be especially avoided in the nail shafts of printing machines or other sheet processing machines. When the hollow shaft is deformed, the inner shaft cannot move smoothly. Moreover, the structure of the printing press is disadvantageous in that the structure is relatively bulky, which impedes the movement of other components. Prior art stops have a relatively thick cross-section in the area surrounding the shaft, especially at the thickened end, which results in a large moment of inertia, which is associated with a large acceleration, which is related to the dynamics of the jaws. Adversely affect certain behaviors.

A band clip for connecting both ends of a tube made of a flexible material or for attaching a joint to the tube end is known from DE 2619179. However, such a band clip is not suitable for making a torque transmitting connection.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to rotationally couple a mechanical element with other mechanical parts, in particular to transmit the torque to the mechanical element on a structural member movable about its longitudinal axis. To provide a space-saving structural device suitable for securing the same so as to avoid deformation of the clamped structural member.

[0005]

According to the invention, the above object is achieved by a device having the features stated in the characterizing part of claim 1. This device has a tension band movably connected to the mechanical element and surrounding the structural member at an angle of 180 ° or more and a pressing member whose inside matches the cross section of the structural member, said pressing member comprising: , Extending substantially over the angular range of the structural member not covered by the tension band, the tension band being fixed to at least one fastening device by means of which the pressing member is directed towards the structural member. It is characterized in that it can be tightened in the radial direction.

Such a device prevents mechanical rotation of the machine element around the hollow shaft of the printing machine, which is movable around its longitudinal axis, preferably a pawl stop on the pawl shaft of a sheet-fed printing press. , And is conveniently used for stepwise tightening and fixing with respect to the phase angle.

[0007]

In such a device, the tightening force introduced through the pressing member is supported in the circumferential direction on the steel band piece so that the substantially uniform effect of the tightening force in the radial direction is transmitted to the structural member such as the hollow shaft. . By doing so, virtually no deformation of the cross section of this hollow shaft occurs.
By enclosing it at an angle of 180 ° or more,
The pulling ends of the steel bands are close together. Thereby, the tensile force produces a radial component, in particular a transverse component to the applied clamping force. The ability of the thin steel band to fit the cross section of the hollow shaft also contributes to an even distribution of force. This configuration has a relatively small moment of inertia. In the area of the steel band, only a small amount of space is required to house a device with the features of the invention. Assembly is easy. No safety measures are required to prevent the tightening screw from coming off automatically. This is because the elastic deformation of the steel band acts as an adjusting screw. A mechanical element such as a claw stopper can be steplessly fixed to a structural member such as a claw shaft at a position at an arbitrary angle.

The features of desirable configurations of the problem solving means according to the present invention are described in claims 3 to 8.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The features of the invention are illustrated by an example of a device for fixing a pawl stopper 1 on a pawl shaft 2 of a sheet-fed printing press. A second pawl shaft 3 formed as a solid shaft is provided in the hollow pawl shaft 2.
However, it is rotatably supported so as to function as lightly as possible without play. On the hollow shaft 2, there is a gripper 4b.
It is supported so that it can rotate freely with the grip case. The gripper case is elastically supported by the gripper 4b through the stopper 1 and the spring 10.

The gripper 4a is firmly screwed to the solid shaft 3. The holding claw closing operation is performed by rotating the claw shafts 2 and 3 in opposite directions. In this case, when the grip jaws come into contact, torque is transmitted to the pawl stopper 1 through the spring 10.

The function of the sheet gripper 4 is that of the nail stopper 1.
Needs to be in a precise circumferential position on the pawl shaft 2. Therefore, to fix the claw stopper 1 to the claw shaft 2,
It must be possible to adjust continuously in the circumferential direction. The device according to the invention, shown in detail in FIGS. 2 and 3, is for fixation. This device has one pawl shaft 1
From a steel band 5 that surrounds 80 ° or more and is firmly connected to the pawl stopper 1, a pressing member 6 whose inner side matches the contour of the peripheral surface of the pawl shaft 2, a nut portion 7a and a screw portion 7b. Is constituted by at least one tightening screw 7. The nut part 7a is supported by the steel band 5 in a radial direction with respect to the longitudinal axis 8 of the pawl shaft 2, so that the two parts are connected to each other in this direction so as to resist pulling. When the free end of the screw portion 7b of the tightening screw 7 is rotated, it acts on the pressing member 6 whose inside is in contact with the peripheral surface of the pawl shaft 2, and the pressing member 6 causes the peripheral surface of the pawl shaft 2 to move by the tightening screw 7. Can be pushed. Steel band 5
Can form an endless snap ring, in which case
The nut portion 7a is supported inside the retaining ring of the steel band 5, and the screw portion 7b penetrates the opening of the retaining ring.

In the embodiment shown in FIG. 2, both ends are fixed to the nut portion 7a so that the force can be transmitted in the radial direction to the longitudinal axis 8 of the pawl shaft 2. Indicates. The bent portions at both ends of the steel band piece 5 are shown. The steel band piece 5 holds the nut portion 7a or the shoulder portion of the nut portion 7a by these bent portions 9. Steel band 5 or Steel band piece 5
Encloses the pawl shaft 2 in an angle range of 180 ° or more, and the pressing member 6 extends almost over an angle range not covered by the steel band 5 or the steel band piece, and therefore is applied by the tightening screw 7. The tightening force is substantially evenly distributed over the peripheral surface of the pawl shaft 2, and the peak of the tightening force acting in the radial direction does not occur. The nail shaft is
It is supported by a steel band that is much more easily deformable than the pawl shaft and can be optimally adapted to the shape of the pawl shaft. By doing so, the cross-section deformation of the hollow pawl shaft 2 does not occur even if the tightening force becomes large. If such a cross-sectional deformation occurs, it will not be possible to support the control shaft 3 in the pawl shaft 2 so as to move smoothly. Compared with the conventional fastening device for fixing the pawl stopper on the pawl shaft, only tensile force is generated in the steel band 5, and accordingly, the material cross section of the steel band 5 is corresponding to that of the conventional fastening device. It can be smaller than the case.

Instead of steel bands, tension bands made of other materials are also suitable. The tightening force of the tension band can also be generated by other means, such as one or several tightening members or an eccentric tightener.

[0015]

As described above, the present invention has the following effects.

Since the tension band surrounds the structural member over an angular range of 180 degrees or more, and the pressing member extends substantially over the angular range not covered by the tension band, the tightening force exerted by the binding device is Since the distribution is substantially even over the peripheral surface of the structural member, the peak of the tightening force acting in the radial direction does not occur. Also, the structural member can be much more easily deformed than the member and can be supported by a tensioning member, such as a steel band, which can optimally conform to the shape of the member. By doing so, the structural member is hollow, and even if a large tightening force acts on this hollow member, cross-sectional deformation of the hollow member does not occur. For example, in the tension band compared to the conventional fastener device that fixes the pawl stopper on the pawl shaft,
The cross section of the pulling band can be smaller than in conventional binding devices, since only pulling forces are produced.

In this way, the mechanical element is connected in a rotationally fixed manner with other mechanical parts, in particular for fixing the mechanical element in a torque-transmitting manner to a structural member which is movable around its longitudinal axis. There is an effect that it is possible to provide a suitable apparatus having a space-saving structure and avoid deformation of the structural member to be tightened.

[Brief description of drawings]

FIG. 1 is a perspective view showing an arrangement of a device having a feature of the present invention for fixing a claw stopper on a claw shaft.

FIG. 2 is a side view of the fixing device as viewed in the direction of the longitudinal axis of the hollow pawl shaft in which the solid pawl shaft is supported.

FIG. 3 is a diagram showing a device in which FIG. 2 is shifted by 90 ° and a pawl shaft is omitted.

[Explanation of symbols]

 1 Claw Stopper 2 Claw Shaft 3 Control Shaft 4 Sheet Paper Holding Claw 4a, 4b Holding Claw 5 Steel Band (Tension Band) 6 Pressing Member 7 Tightening Screw (Clamp) 7a Nut Part 7b Screw Part 8 Vertical Axis Center 9 Bending Part 10 Compression spring 11 Bearing

 ─────────────────────────────────────────────────── ———————————————————————————————————————————————————————————————————————————————— Helmstedt Germany 74889 Zinsheim Schutzenstrasse 4

Claims (8)

[Claims] 1. A device for non-rotatably coupling a mechanical element to a structural member movable about a longitudinal axis of the mechanical part, wherein the mechanical element (1) is fixedly connected to the structural element (1). 2) has a pulling band (5) surrounding it at an angle of 180 ° or more, and a pressing member (6) having an inner shape matching the cross section of the structural member (2), the pressing member (6) ) Extends substantially over the angular range of the structural member (2) not covered by the tension band (5), the tension band (5) being fixed to at least one fastening device (7), Fastening device (7)
By means of said pressing member (6) a mechanical element is characterized in that it can be clamped radially towards the structural member (2) for non-rotatably coupling to a structural member movable about a longitudinal axis. apparatus. 2. Device according to claim 1, characterized in that it has a pulling band consisting of a steel band (5). 3. A fastener device comprising a tightening screw (7), a steel band (5) being fixed to the nut part (7a) thereof, the screw part being able to be turned by a pluggable tool. The device according to claim 1 or 2, which is capable. 4. A mechanical element (4), preferably a pawl shaft (2) of a sheet-fed printing press, on the peripheral surface of a hollow shaft (2) of the printing press, movable about a longitudinal axis (8). In the device for fixing the pawl stopper (1) so that it does not rotate and does not rotate by tightening steplessly with respect to the phase angle, the device encloses the pawl shaft (2) at an angle of 180 ° or more. A steel band (5) fixedly connected to the pawl stopper (1), a pressing member (6) which matches the peripheral contour of the pawl shaft (2) inside, and at least one tightening A tightening screw (7), a steel band (5) is fixed to a nut portion (7a) of the tightening screw (7), and the pressing member (6) is rotated by turning the tightening screw to form a vertical shaft. Radial toward the longitudinal axis (8) of the pawl shaft (2) that can vibrate around the core A device for fastening a mechanical element to a peripheral surface of a hollow shaft of a printing machine, which is movable around a longitudinal axis, and fixed in a stepless manner with respect to a phase angle so as not to rotate. 5. Device according to claim 1, wherein the tension band (5) is deformable much more easily than the pawl shaft (2). 6. A steel band (5) forms an endless snap ring, and a tightening screw (7) has a nut part (7a) supported on the inside of this snap ring and a mantle of a pawl shaft (2). 3. Acting with a pressing member (6) supported by
The described device. 7. Device according to claim 2 or 6, characterized in that both ends of the steel band piece (5) are fixed to the nut part (7a). 8. The steel band piece (5) at both ends thereof has a bent portion (9), and the bent portion holds the nut portion (7a) or a shoulder of the nut portion. The device according to item 1.